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情態動詞must/have to,dare/need的用法

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情態動詞指本身有一定的詞義,用來表示語氣的單詞,但是不能獨立作謂語,只能和動詞原形一起構成謂語,情態動詞雖然數量較多,用途廣泛,是各類考試都一定會考查的重點。這次就來和大家講講must/have to,dare/need這兩組詞的用法。

情態動詞must/have to,dare/need的用法

 

must/have to:

 ① 表示必須、必要,在回答問句時,如果是否定的,必須用needn’t, don’t have to

eg. ---- Must I finish my homework before dinner?

     ---- Yes, you must.

     ---- No, you don’t have to / you needn’t.

② must是說話人的主觀看法, 而have to則強調客觀需要,have可根據時態人稱的變化而變化

eg.That film is interesting,I really must go to watch.

  You have to get to school before 8 am.

③ 表示推測、可能性(只用於肯定的陳述句)

eg.You must know that,you are a teacher.

 

dare/need:

①  dare作情態動詞用時, 常用於疑問句、否定句和條件從句中

eg.How dare you say that to me?

② need 作情態動詞用時, 常用於疑問句、否定句

eg. Need I finish my homework before dinner?

③ dare和 need也可以做實義動詞來用,獨自充當謂語。

eg.The little girl dares to go to school by herself.

 

好了以上就是這兩組詞的用法總結了,內容不少,大家掌握得如何啊?情態動詞是一種非常常用的輔助詞,尤其是在口語中,很多時候你甚至不用說完一個句子,只要說個情態動詞,對方就能馬上懂你的意思,情態動詞本身就因爲西方社會的各類習俗而有了許多約定俗成的內涵意義,所以各位學習者們一定不能忽視這個知識點。

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